General

  • Target

    c81d1895f7472cec079c7f12419feaf0.exe

  • Size

    820KB

  • Sample

    211019-rtkc2aghdj

  • MD5

    c81d1895f7472cec079c7f12419feaf0

  • SHA1

    729557420c331200cbad77b7f98a0f5841933a63

  • SHA256

    6aae67d87cd2ef23c4b9265c8e83db5142f00154e66e47b1e54219cea794682b

  • SHA512

    9fbb32e99b3a321f5c5ea1c2bea24249ca5b335514f3f6a70342609932a45aab324d71030febbd18b0aa6d63698146a384ba37da17f7a84d4018ab48660d52cc

Malware Config

Extracted

Family

djvu

C2

http://rlrz.org/fhsgtsspen6

Extracted

Family

vidar

Version

41.3

Botnet

517

C2

https://mas.to/@oleg98

Attributes
  • profile_id

    517

Targets

    • Target

      c81d1895f7472cec079c7f12419feaf0.exe

    • Size

      820KB

    • MD5

      c81d1895f7472cec079c7f12419feaf0

    • SHA1

      729557420c331200cbad77b7f98a0f5841933a63

    • SHA256

      6aae67d87cd2ef23c4b9265c8e83db5142f00154e66e47b1e54219cea794682b

    • SHA512

      9fbb32e99b3a321f5c5ea1c2bea24249ca5b335514f3f6a70342609932a45aab324d71030febbd18b0aa6d63698146a384ba37da17f7a84d4018ab48660d52cc

    • Detected Djvu ransomware

    • Djvu Ransomware

      Ransomware which is a variant of the STOP family.

    • Vidar

      Vidar is an infostealer based on Arkei stealer.

    • suricata: ET MALWARE Potential Dridex.Maldoc Minimal Executable Request

      suricata: ET MALWARE Potential Dridex.Maldoc Minimal Executable Request

    • suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)

      suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)

    • suricata: ET MALWARE Vidar/Arkei Stealer Client Data Upload

      suricata: ET MALWARE Vidar/Arkei Stealer Client Data Upload

    • suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer Data Exfil

      suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer Data Exfil

    • Vidar Stealer

    • Downloads MZ/PE file

    • Executes dropped EXE

    • Loads dropped DLL

    • Modifies file permissions

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • Accesses 2FA software files, possible credential harvesting

    • Accesses cryptocurrency files/wallets, possible credential harvesting

    • Adds Run key to start application

    • Checks installed software on the system

      Looks up Uninstall key entries in the registry to enumerate software on the system.

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v6

Execution

Scheduled Task

1
T1053

Persistence

Registry Run Keys / Startup Folder

1
T1060

Scheduled Task

1
T1053

Privilege Escalation

Scheduled Task

1
T1053

Defense Evasion

File Permissions Modification

1
T1222

Modify Registry

2
T1112

Install Root Certificate

1
T1130

Credential Access

Credentials in Files

3
T1081

Discovery

Query Registry

2
T1012

System Information Discovery

2
T1082

Collection

Data from Local System

3
T1005

Tasks